Java开发问题

Android Emulator: Failed to pull selection(Android 模拟器:无法拉取选择)
Android Emulator snapshot error(Android 模拟器快照错误)
quot;R cannot be resolvedquot; may have wrong build path or libraries import(“R 无法解决可能有错误的构建路径或库导入)
Could not find class(找不到班级)
Unable to instantiate activity ComponentInfo(无法实例化活动 ComponentInfo)
Android application doesn#39;t start from Eclipse(Android 应用程序不从 Eclipse 启动)
How to Get Device Height and Width at Runtime?(如何在运行时获取设备高度和宽度?)
How to programmatically check availibilty of internet connection in Android?(如何以编程方式检查 Android 中互联网连接的可用性?)
Android emulator error: quot;System UI has stoppedquot;(Android 模拟器错误:“系统 UI 已停止)
Android - Unable to get the gps location on the emulator(Android - 无法在模拟器上获取 gps 位置)
How do I install a JRE or JDK to run the Android Developer Tools on Windows 7?(如何安装 JRE 或 JDK 以在 Windows 7 上运行 Android 开发人员工具?)
What does this 4 line java code means in android application?(这 4 行 java 代码在 android 应用程序中意味着什么?)